MELSEC iQ-R Series
Programmable Logic Controllers
Installation Manual for Digital Input and
Art.no.: 294687 ENG, Version A, 20082015
For use by qualified staff only
The instructions in this manual are written for qualified electrical technicians
who are already familiar with automation technology safety standards. System
configuration and layout, installation, setup, servicing and testing of the equip-
ment may only be performed by qualified electrical technicians. Any modifica-
tions to the hardware and/or software of our products not specifically described
in this manual may only be performed by authorised Mitsubishi Electric staff.
Proper product use
The programmable logic controllers (PLCs) of the MELSEC iQ-R series are only
intended for the applications described in this installation manual and/or the
other manuals referenced below. All operating parameters and settings speci-
fied in this manual must be observed. The products described have all been
designed, manufactured, tested and documented in strict compliance with the
relevant safety standards. Unauthorised modification of the hardware or soft-
ware or failure to observe the warnings in this manual and on the products may
result in serious injury to personnel and/or damage to property. Only peripherals
and expansion equipment specifically recommended and approved by Mitsub-
ishi Electric may be used with the programmable logic controllers of the MELSEC
iQ-R series. All and any other uses shall be deemed to be improper.
All safety and accident prevention regulations relevant to your application
must be observed in your system configuration and layout and for installation,
setup, servicing and testing of these products.
This manual includes warnings to help you use the products properly and
safely. These warnings are identified as follows:
User injury hazard.
Failure to observe these safety warnings can result in health
and injury hazards for the user.
Equipment damage hazard.
Failure to observe these safety warnings can result in serious
damage to the equipment or other property.
You can find more information on these products in the following manuals
● MELSEC iQ-R Series Hardware Manual
● MELSEC iQ-R Series Programming Manual
You can download these manuals from our website free of charge
If you have any questions about installing, programming and operating
MELSEC iQ-R series controllers, please don't hesitate to contact your local sales
office or distributor.
Names and Functions of Parts
Modules with screw terminals
Modules with 40-pin connector(s)
● ON: In operation
● OFF: 5V power off
Indicator LED (For each input/output a red LED is available which
indicates the ON/OFF status of I/O (lit when I/O is ON.))
Module identification lamp
● Light gray: Input
● Dark orange: Output
Indicates the rated voltage, and input current or output current.
Indication selector switch
● For the input module or output module: A switch for changing
the LED indication to either the first-half 32 points or the latter-
half 32 points of a 64-point module
● For the I/O combined module: A switch for changing the LED indi-
cation for input or output
Terminal block with 18 screw terminals
A connector for connecting I/O signal wire from external devices.
Production information marking
Shows the production information (16 digits) of the module.
Pin Arrangement of the Connectors
The connectors are shown in module front view.
Please note that the 40-pin connector is not a D-sub connector. For connection
the connectors A6CON1, A6CON-2, or A6CON-4 or prefabricated connection
cables can be used (see section Wiring).
The dimensions of all digital I/O modules are identical.